颖,颖苞
Glume \Glume\, n. [L. gluma hull, husk, fr. glubere to bark or peel: cf. F. glume or gloume.] (Bot.) The bracteal covering of the flowers or seeds of grain and grasses; esp., an outer husk or bract of a spikelt. --Gray.
glume n : small dry membranous bract found in inflorescences of Gramineae and Cyperaceae